We’ve heard it said before that you should build things twice. Once to learn how to build it and the second time to build it right. [AA7EE] must agree. He was happy with his homebrew regenerative receiver that he called Sproutie. But he also wanted to build one more and use what he learned to make an even better receiver. The Sproutie Mark II was born.
This isn’t some rip off of an old P-Box kit either. [AA7EE] used a four-device RF stage with FET isolation back to the antenna and a regulated power supply. Plug in coils allow reception on multiple bands ranging from about 3 to 13 MHz. There’s an audio stage with multiple selectable audio filters, and–the best part–a National HRO tuning dial that is a work of art all by itself.
You wouldn’t put the Mona Lisa in a wood shed, and [AA7EE] didn’t want that beautiful dial in some makeshift case. Instead he built a chassis that would be at home in a tube radio, a professionally-made front panel, and a gorgeous wooden case. The final result is a beautiful set that apparently performs quite well, too (see the video below).
Even the insides are clean looking. The Manhattan construction is neat (and looks good thanks, in part, to the use of meSQUAREs). Of course, if you are lazy like we are, you might want to stick to one chip and a breadboard. Sure doesn’t look as good as the Sproutie Mark II, though.
Thanks to [jmilldrum] for passing this along.